Seo District (Korean: 서구; RR: Seo-gu) is a gu ("district") of Daejeon, South Korea. Daejeon Metropolitan City Hall is also located there.

Seo-gu is divided into 14 'dong (neighborhood) (동, "neighborhoods"):

• Gasuwon-dong
• Gwanjeo-dong
• Giseong-dong
• Wolpyeong-dong
• Nae-dong
• Gajang-dong
• Goejeong-dong
• Dunsan-dong
• Sancheon-dong
• Tanbang-dong
• Yongmun-dong
• Byeon-dong
• Boksu-dong
• Doma-dong

Dunsan-dong is one of the more densely populated areas of Daejeon. As a result, it is the location of several points of interest. These include department stores, government offices, and several international chain restaurants and retailers. There is Pai Chai University in Seo District, Daejeon. There is also Hanbat Arboretum. There is also the "Cafe Wave". There is an Art Center. Jangtae Recreational Forest is located in the district.

Also, Daejeon Arts Center, a representative general concert hall in Daejeon, is also located in Seo-gu.

• Daejeon Gwanjeo High School

• Official website (in English)

36°21′N 127°23′E / 36.35°N 127.38°E / 36.35; 127.38